Hanna HI4004 Calcium Half-Cell Ion Selective Electrode

Hanna HI4004 Calcium Ion Selective Electrode – Polymer Membrane Half-Cell Sensor for Precise Calcium Ion Detection

The Hanna HI4004 Calcium Half-Cell Ion Selective Electrode is a polymer membrane ion-selective electrode (ISE) designed to measure calcium ion (Ca²⁺) concentrations in aqueous solutions. This half-cell configuration requires pairing with a reference electrode for a complete measurement system. It is ideal for environmental monitoring, agriculture, food and beverage quality control, and academic laboratories.

Capable of detecting calcium levels from 1 M to 3 × 10⁻⁶ M (40080 ppm to 0.12 ppm), the HI4004 provides stable, linear response across a practical pH range, making it an essential tool for routine calcium analysis in various matrices.

Key Features

Selective Calcium Ion Measurement

• Reliable determination of free calcium ions in solution

• Measurement range: 40080 ppm to 0.12 ppm (1 M to 3 × 10⁻⁶ M)

Polymer Membrane Technology

• Incorporates a calcium-selective polymer membrane for consistent sensitivity and long lifespan

• Delivers a slope of approximately +28 mV per decade of concentration

Designed for Mid-Range pH Applications

• Operates best within a pH range of 4 to 10, ideal for natural water and buffered samples

Durable and Lab-Friendly Design

• PVC body with a 12 mm diameter and 120 mm insertion length for use in beakers and titration vessels

• Temperature operating range: 0 to 40°C

Universal Connectivity

• Equipped with a 1-meter coaxial cable and standard BNC connector for use with most ion meters or pH/ISE meters

Technical Specifications

Applications

• Agriculture – Evaluate calcium in soil extracts, fertilizers, and irrigation water

• Food & Beverage Industry – Analyze calcium content in milk, juices, mineral water, and other consumables

• Water Treatment – Monitor calcium hardness in municipal or industrial water systems

• Environmental Testing – Track calcium concentrations in rivers, lakes, and reservoirs

• Academic & Research Labs – Ideal for calcium titration studies and educational demonstrations